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annotate packages/kernel/current/include/except.hxx @ 94:4642a6d35749 ecos-sw-2000-06-02

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Merge from eCos master repository on 2000-06-02-07:47:04-BST
author jlarmour
date Fri, 02 Jun 2000 17:35:00 +0000
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1 #ifndef CYGONCE_KERNEL_EXCEPT_HXX
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2 #define CYGONCE_KERNEL_EXCEPT_HXX
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3
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4 //==========================================================================
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5 //
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6 // except.hxx
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7 //
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8 // Exception handling declarations
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9 //
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10 //==========================================================================
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11 //####COPYRIGHTBEGIN####
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12 //
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13 // -------------------------------------------
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14 // The contents of this file are subject to the Red Hat eCos Public License
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15 // Version 1.1 (the "License"); you may not use this file except in
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16 // compliance with the License. You may obtain a copy of the License at
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17 // http://www.redhat.com/
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18 //
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19 // Software distributed under the License is distributed on an "AS IS"
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20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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21 // License for the specific language governing rights and limitations under
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22 // the License.
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23 //
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24 // The Original Code is eCos - Embedded Configurable Operating System,
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25 // released September 30, 1998.
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26 //
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27 // The Initial Developer of the Original Code is Red Hat.
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28 // Portions created by Red Hat are
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29 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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30 // All Rights Reserved.
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31 // -------------------------------------------
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32 //
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33 //####COPYRIGHTEND####
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34 //==========================================================================
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35 //#####DESCRIPTIONBEGIN####
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36 //
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37 // Author(s): nickg
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38 // Contributors: nickg, jlarmour
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39 // Date: 1999-02-16
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40 // Purpose: Define exception interfaces
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41 // Description: The classes defined here collectively implement the
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42 // internal API used to register, manage and deliver
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43 // exceptions.
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44 // Usage: #include <cyg/kernel/thread.hxx>
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45 //
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46 //####DESCRIPTIONEND####
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47 //
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48 //==========================================================================
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49
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50 #include <cyg/kernel/ktypes.h>
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51 #include <cyg/infra/cyg_ass.h> // assertion macros
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52 #include <cyg/hal/hal_intr.h> // exception defines
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53
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54 // -------------------------------------------------------------------------
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55 // Exception handler function prototype
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56
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57 typedef void cyg_exception_handler(
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58 CYG_ADDRWORD data, // user supplied data
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59 cyg_code exception_number, // exception being raised
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60 CYG_ADDRWORD exception_info // any exception specific info
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61 );
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62
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63 // -------------------------------------------------------------------------
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64 // Exception delivery interface. This function is exported to the HAL which
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65 // invokes it for all exceptions that it is not able to handle itself.
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66
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67 externC void cyg_hal_deliver_exception( CYG_WORD code, CYG_ADDRWORD data );
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68
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69 // -------------------------------------------------------------------------
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70 // Exception control class. Depending on the configuration there is either
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71 // one of these per thread, or one for the entire system.
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72
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73 #ifdef CYGPKG_KERNEL_EXCEPTIONS
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74
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75 class Cyg_Exception_Control
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76 {
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77
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78 #ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
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79 cyg_exception_handler *exception_handler[CYGNUM_HAL_EXCEPTION_COUNT];
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80
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81 CYG_ADDRWORD exception_data[CYGNUM_HAL_EXCEPTION_COUNT];
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82 #else
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83 cyg_exception_handler *exception_handler; // Handler function
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84
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85 CYG_ADDRWORD exception_data; // Handler data
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86 #endif
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87
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88 public:
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89
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90 Cyg_Exception_Control();
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91
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92 // Register an exception handler for either the specific exception
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93 // or for all exceptions.
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94 void register_exception(
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95 cyg_code exception_number, // exception number
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96 cyg_exception_handler handler, // handler function
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97 CYG_ADDRWORD data, // data argument
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98 cyg_exception_handler **old_handler, // handler function
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99 CYG_ADDRWORD *old_data // data argument
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100 );
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101
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102 // Remove an exception handler.
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103 void deregister_exception(
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104 cyg_code exception_number // exception number
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105 );
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106
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107 // Deliver the given exception now by invoking the appropriate
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108 // exception handler.
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109 void deliver_exception(
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110 cyg_code exception_number, // exception being raised
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111 CYG_ADDRWORD exception_info // exception specific info
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112 );
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113 };
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114
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115 #endif
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116
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117 // -------------------------------------------------------------------------
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118 #endif // ifndef CYGONCE_KERNEL_EXCEPT_HXX
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119 // EOF except.hxx